大功率速调管腔体新型加载结构的设计OA

To address issues in conventional high-power klystron cavity loading structures coated with attenu-ation materials such as FeSiAl,including susceptibility to coating detachment,imprecise tuning of loading effects,and thermal accumulation due to inadequate heat dissipation,two novel resonant cavity loading structures are pro-posed and designed.The first one is a metal ridge and attenuation material interleaved loading structure,which en-hances heat dissipation by concentrically and alternately arranging metal ridges and attenuation materials on the cavity lid.Post-sintering loading adjustment is achieved by tuning the ridge height via turning operations,yielding a Q-factor tuning range of up to 32%and reducing the peak temperature of the attenuation material to 86.27%of that in conventional structures.The second one is an all-metal ridge loading structure,which introduces adjustable-height and variable-number metal ridges between the outer circumference of the cavity lid and the cavity wall.The structure achieves a Q-factor tuning range of up to 64.3%,lowers the peak temperature of the loading structure to 51.44%of the conventional design,fundamentally eliminates the risk of evaporation and detachment of attenuation material coatings,and simplifies the cavity loading process.Electromagnetic and thermal simulations of a 1.3 GHz cylindrical cavity demonstrate that the two new structures effectively reduce the cavity Q-factor to as low as 14.3%and 16.7%of the unloaded cavity,respectively,while exhibiting improved thermal management and flexibly tuna-ble loading performance.The research offers effective technical pathways for enhancing the bandwidth,stability,and reliability of high-power klystrons.